题目

This 12-year-old Girl Built a Robot to Find Plastics in the OceanAnna Du was walking along the beach when she noticed plastics there. She reached down to pick them up, and quickly realized there were many more tiny pieces than she could deal with. It seemed impossible to clean them all up. Du, 12 years old at the time, tried to solve the problem like any good scientist—first, by doing a little research. That’s how she learned that 8 million tons of plastics end up in the oceans every year. Then she got to work building something that could help solve the problem; a remote-operated vehicle(读长江流域图，回答下列问题。（8分）（1）长江发源于_________________ 山脉，流经青藏高原、云贵高原、_____________盆地、长江中下游平原，最终注入______海。（2）长江有“ 水能宝库”之称，水能资源主要集中在_________河段。（3）城市A是____________ ；城市B是武汉，它位于长江最长支流__________（河流）与干流的交汇点。（4）鄱阳湖与长江干流的交汇点是____________（地名），它是长江中、下游的分界。（5）三峡水利枢纽工程位于长江的上游，该工程具有____________________等效益。